I sent two spies. One arrived and did his job. The second, sent at the same time has yet to arrive and the "countdown" clock for him is running forward? Does this mean he will ever arrive because every second his estimated arrival time gets larger?
Actually when the US worlds began there was no relocation feature. That came some time later. Of course when US1 started there were no resource deposits, second village... A lot of these developments were introduced later during that world or on subsequent worlds.